Skip-dump.



J. ANGOVE. SKIP DUMP. APPLICATION FILED APB. 13,1908.

Patented Nov. 10, 1908.

' 8 SHEETS-SHEET 1.

5] mm wi e z J. ANGOVE.

SKIP DUMP. APPLIOATION FILED APR. 13. 1908.

903,263. Patented Nov. 10, 1908. I 3 SKEBTSSHHET 2.

J. ANGOVB.

SKIP DUMP.

APPLICATION rum) APR. 1a, 1908.

' Patented Nov. 10, 1908. 3 SHEETS-SHEET 3.

Wiimawaaz. m /KJMZZ JOHN ANGOVE, OF CALUMET, MICHIGAN.

SKIP-DUMP.

Specification of Letters Patent.

Patented Nov. 10, 1908.

Application filed April 13, 1908. Serial No. 426,867.

To all whom it may concern:

Be it known that I, JOHN ANGovE, a citizen of the United States, residing at Calumet, in the county of Houghton and State of Michigan, have invented certain new and useful Improvements in Skip-Dumps, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to improvements in conveyers and particularly to that class of conveying machinery commonly called skipdumps.

An object of my invention is to provide a conveying apparatus of the class described which will be simple in construction and safe and efficient in operation.

One feature of my invention resides in the continuity of the tracks, which are not cut into or formed with curved ends, but which run straight and continuous from the bottom of the shaft to the top of the shaft house.

Another feature of my invention lies in the means provided to keep the skip-car upon the tracks at all times and particularly in the case of an overwind.

A further feature of my invention consists in the arran ement of parts whereby cars carrying di erent kinds of rock may be moved over the same tracks and dumped at any desired point.

Other features of my invention will be alluded to in the description and claims which follow hereinafter.

In the drawings illustrating the principle of my invention and the best mode now known to me of applying that principle, F igure 1 is an elevation and Fig. 2 a plan of my new skip-dump; Fig. 3 is a sectional view on the line A A of Fig. 1, looking in the direction of the arrow; Fig. 4 shows a modification in which a counterweighted switch is used; Fig. 5 is a plan of part of what is shown in Fig. 4; Fig. 6 is a detail of the switch-operating mechanism; Fig. 7 is a side View showing the upper and lower dumptracks and the means provided for preventing an accident in case of an overwind upon the lower dumptracks; Fig. 8 is a side view of the lower dump, the switch-operating devices being shown removed; Fig. 9 is a detail showing the mounting of the dumpwheels or rollers; and Fig. 10 is a detail showing the means for bracing and supporting the structure.

Upon the wooden girders or stringerpieces a (Figs. 1, 2, 4 and 10) are laid the main rails or tracks 7) which extend without interruption straight up from the bottom of the shaft to the top of the shafthouse (not shown herein). At the point where the material is to be dumped, a chute c is provided; and above the latter is mounteda shaft d upon which are the dump-wheels or rollers e (Fig. 9). Opposite the chute c are located the dump-tracks f connected to and supported by the angle-plates a which extend from the stringer-pieces a. The latter and the dump-tracks are supported laterally by the angle-beams a. (Fig. 10). Theupper end of each dump-track f 1s provided with a pocket 9 and the lower end of each 18 provided with a stationary curved switchpiece 71, which extends downwardly towards the stringers a.

The skip-car z' is provided with the usual flanged wheels 7', is, the tread of the front wheels 7' being more narrow than the tread of the hind wheels k (see Figs. 2 and 3). The interval between the rails b is less than the interval between the lower ends of the switch-pieces 72,; and from this arrangement of parts it results that the front wheels j will pass between the switch-pieces h and will continue on the tracks 6; while the rear wheels is by reason of their wider tread will ride up the switch-pieces h and along the dump-tracks f. As the skip-car 2' assumes a horizontal position, the wear-straps m on its bottom ride over the rollers e, and thus the front end of the skip-car z is prevented from falling down and binding against the chute 0; and the wheels j of the skipcar are prevented from being stuck fast agalnst the dump-tracks f (Fig. 1). Should the attendant allow an overwind of the hoisting cable, the rear wheels is will be caught by the recesses or pockets 9 and will be held therein, thereby preventing the car from falling back down the shaft and causing an accident. To keep the rear wheels is in their proper position on the switch-pieces h and the dump-tracks f, the latter are provided with guard-rails a. To keep the rear wheels is intheir proper position on the switchpiece it and the dump-tracks f, the latter are provided with the guard-rails n.

It is often found desirable to sort the material, as into good rock and bad rock, and to dump the different kinds at different points along the track I). For this purpose there is provided the arrangement of parts shown in Figs. 4, 5, 6 and 8, the latter being the rock-shaft r, the latter is provided at one end with the rocker-arm a the free end of which is connected with the switch-lever 'v by the link to, and with one end of a cord or the other end of which passes over a pulley y and sustains a weight .2. To the free end of the rocker-arm u is attached a weight a. The normal position of the switch-piece is shown in dotted lines in Fig. i and may be called open. The weights 2, z are so adjusted that it requires very little effort to close the switch-piece g to the position shown in full lines in Fig. 4, and a boy may operate the switch-lever 'v with perfect case. After the switch-piece g has started to close down upon the stringers a, the leverage of the cord m increases about the shaft 9" as a pivot, as will be made apparent by a study of the parts shown in Fig. 4. By this arrangement the operation of closing the switch is made easy. For the purpose of steadying the operation of the switch-pieces V q, guard-plates q are mounted on each girder a in position to engage and hold the free end of the switch-piece when the latter is lowered.

If the car contains material which it is des red 'todump through the chute 2, the switch-pleces (7' are lowered to the position indicated by the full lines in Figs. 4, 7 and 8; but if it be desired to dump the material through the chute c of the upper dumptracks f, the switch-pieces q are allowed to remain raised, as indicated by the dotted lines in Fig. 4; in which case the skip-car 2' will contlnueon the main tracks Z) past the swltch and will enter upon the upper dumptracks f, as hereinbefore explained.

The skip-car can in my new dump construction be hoisted at any speed without any danger of the cars jumping the tracks; for, the main tracks Z) are continuous and the dump-tracks f serve not only to tilt the rear end of the car to dumping position, but

they also serve to hold the front wheels 7' from leaving the rails 5. (See full lines in figure 1). In case of an overwind upon the upper dump-tracks f, the front wheels 7' will ride along the bottom of the dump-tracks and the hind wheels will continue along the top of the dump-tracks, until the hind wheels reachthe pockets or recesses 9, into which they will fall (see the dotted lines in Fig.

1). These pockets are shapedto fit the rear wheels 70, and in case the hoisting cable should break, the car will hang suspended from the top of the dump-tracks f and will not fall to the bottom of the shaft, whereby serious accident is avoided.

To guard against accident in case of an overwind upon the lower dump-tracks 0, the arrangement of parts shown in Fig. 7 is provided. Here the lower and upper dumps are shown separated by a short distance 3; and to the girders (4 below the opposed ends of the upper and lower dump-tracks f and o is suitably attached a bed-plate l of wood or iron which extends beneath the open space 3 and between the girders a. In case of an overwind the front edge of the skipcar will engage the bedplate 4;, thus causing the car to turn bottom-side up and the hindwheels to be thrown acrossthe open space 3 and upon the upper dump-tracks f- Upon lowering away, the skip-car will run from the dotted-line position in Fig. 7 to the full line position in the same figure; and will bring up against and be arrested by the dumpwheels e of the lower dump. The bedplate t thus effectually prevents the car from crashing against the track structure and affords protection from accidents due to an overwind. To right the car again, it is hauled up between the dumps, until its hindwheels 70 can be thrown back upon the lower dump-tracks 0, and when this is accomplished, the wheels ii: are pulled back upon the tracks 0 and the car is lowered away.,

Heretofore, so far as known to me, the main rails or tracks in apparatus of this class have been bent at the dumping point, and the auxiliary or dump tracks for supporting the rear wheels have been laid in substantial continuation of the general 'direction of the main tracks previous to their change of direction.

By this construction the car is dumped by reason of its front'partmoving out on the bent portion of the main rails at the dumping point. But in carrying out my invention the main rails continue without change of direction on beyond the dumping point and the car is dumped by tilting its rear end which, for this purpose, is switched from the main rails below the dumping point to dump-tracks (or spur-tracks) which extend alongside and substantially parallel in their main portion to the main rails which lie adjacent to them. These clump-tracks serve also'the function of preventing the front wheels from jumping the main rails, since the front wheels pass above the main rails and below the clump-tracks, or betweenthe main rails and the dump-tracks. This construction permits a higher speed of operation than would otherwise be possible, and danger resulting from an overwind is obviated by the provision of .the pockets in the upper end of the du1nptracks.

I claim:

I 1.:1'11 an apparatus of the class described,

the combination of a pair of main rails; a pair of dump-tracks which extend alongside said rails and are provided at one end with switch-pieces that extend towards said rails, the latter continuin beyond said switchpieces in both directions substantially parallel to said dump-tracks; and a skip-car provided with two pairs of wheels, the tread of one of said pairs of wheels being greater than the tread of the other of said pairs and the interval between said switch-pieces being greater than the interval between said main rails; whereby the wheels of narrow tread continue on said main rails past said switchpieces and between said rails and dumptracks, while the wheels of wide tread engage said switch-pieces and of said dump-tracks.

2. In an apparatus of the class described,

the combination of a pair of main rails; a

pair of clump-tracks which are provided at one end with switch-pieces that extend towards said rails and at the other end with a pocket; and a skip-car provided with wheels of narrow tread which continue on said main rails and with wheels of wide tread which ride on said switch-pieces and along said dump-tracks; said pockets being each shaped to fit snugly and retain therein one of said wheels of wide tread.

3. In an apparatus of the class described, the combination of a pair of main rails; a pair of dump-tracks extending alongside the same and each provided at one end with a pocket; and a skip-car provided with wheels of narrow tread which continue on said main rails and with wheels of wide tread which ride on said dump-tracks; said pocket being shaped to fit snugly around and retain therein one of said wheels of wide tread.

4:. In an apparatus of the class described, the combination of a pair of main rails; supports therefor; a chute held by said supports; rollers held by said supports above said chute; a pair of dump-tracks; and a skip-car of wheels, one of said pairs riding on said rails and another of said pairs riding on said dump-tracks; said rollers preventing the front end of said skip-car from binding against said chute during the operation of dumping said skip-car.

5. In an apparatus of the class described, the combination of a pair of main rails; supports therefor; a pair of dump-tracks adjacent to said main rails; a skip-car provided with a plurality of pairs of wheels, one of said pairs continuing on said main rails,

ride along the outside Y provided with a plurality of pairswhile the other of said pairs ride upon said dump-tracks during the operation of dumping; a chute mounted on said supports; and devices held by said supports above said chute for preventing the front end of said skip-car from binding against said chute during dumping.

6. In an apparatus of the class described, the combination of a pair of main rails; a pair of dump-tracks adjacent thereto switchpieces hinged to said dump-tracks; devices for swinging said switch-pieces towards and from said main rails; and a skip-car havin wheels of different widths of tread; sai switch-pieces being separated from each other by an interval difl'erent from that by which said main rails are separated.

7. In an apparatus of the class described, the combination of a pair of main rails; a pair of dump-tracks adjacent thereto; switch-pieces hinged to said dump-tracks; counterweighted devices for swinging said switch-pieces towards and from said main rails; and a skip-car having wheels of different widths of tread; said switch-pieces being separated from each other by an interval different from that by which said main rails are separated.

8. In an apparatus of the class described, the combination of a pair of main rails which continue without change of direction beyond the dumping point; a pair of dumptracks provided with switch-pieces below said dumping point, said switch-pieces extending towards said main rails and being separated by an interval different from that separating said main rails; and a skip-car provided with wheels of different widths of tread, some of said wheels passing from said main rails to said switch-pieces and thence to said dun1p-tracks, while the others of said wheels continue on said main rails.

9. In an apparatus of the class described, the combination of a pair of main rails; a plurality of sets of dump-tracks, said sets being separated from each other by an opening; and a bed-plate mounted below said rails for guiding the skip-car in case of an overwind upon the lowermost set of dumptracks. a

In witness whereof I have hereunto set my hand at said Calumet this twenty fourth August, 1907, in the presence of the two undersigned witnesses.

JOHN ANGOVE;

Witnesses:

W. T. RALEY, JOHN D. KERR. 

